Getting Started with GCP Cloud Run and Deploy Your First Application

Google Cloud Run is a fully managed serverless compute platform that enables you to run stateless HTTP containers on the Google Cloud Platform (GCP). It provides an easy and cost-effective way to deploy your containerized applications, with automatic scaling and built-in security features. In this article, we will explore the basics of GCP Cloud Run and create a simple example.

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Getting Started with GCP Cloud Run

Before we get started with Cloud Run, you will need to have the following prerequisites:

• A Google Cloud Platform account
• A containerized application that you want to deploy to Cloud Run
• The Cloud SDK installed on your local machine

To create a new Cloud Run service, follow these steps:

1. Open the GCP Console and select your project.
2. Navigate to the Cloud Run page from the left-hand side navigation bar.
3. Click on “Create Service” to begin.
4. In the “Create Service” window, you will be prompted to configure your service settings. Give your service a name, select the region, and choose your deployment platform.
5. Click on “Next” to continue.
6. In the next step, you will need to configure your container. If you already have a container in a container registry, select “Use an existing container image”. Otherwise, you can choose “Build and deploy a new container image”.
7. If you select “Build and deploy a new container image”, you will need to specify your Dockerfile location, image name, and tag. You can also specify any build arguments or environment variables that your container requires.
8. Click on “Create” to create your Cloud Run service.

Deploying a Sample Application to GCP Cloud Run

Now that you have created a new Cloud Run service, it’s time to deploy a sample application. In this example, we will deploy a simple Python Flask application that returns a “Hello, World!” message.

1. Create a new directory on your local machine and create a new file called app.py with the following code:

from flask import Flask

app = Flask(__name__)

@app.route('/')
def hello_world():
    return 'Hello, World!'

if __name__ == '__main__':
    app.run(debug=True, host='0.0.0.0', port=int(os.environ.get('PORT', 8080)))

2. Create a new file called Dockerfile with the following code:

# Use the official Python image as the base image
FROM python:3.8-slim-buster

# Set the working directory in the container
WORKDIR /app

# Copy the requirements file into the container and install the dependencies
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Copy the rest of the application code into the container
COPY . .

# Expose the port that the application will be listening on
EXPOSE 8080

# Set the command that will be run when the container starts
CMD ["python", "app.py"]

3. Create a new file called requirement.txt with the following code:

flask==1.1.2

4. Build your Docker image by running the following command in your terminal:

docker build -t gcr.io/[PROJECT_ID]/hello-world

Congratulations! You have created your first Cloud Run App.